Shift Rod Coil Pin Hole ? |
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Shift Rod Coil Pin Hole ? |
cary |
Feb 4 2018, 09:16 AM
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#1
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest |
Good Morning,
Yesterday was supposed to be the day Mike drives off in his freshen up 72 daily driver. Didn't quit go as planned ................ I finished the shift rod install before lunch. Then he and his right hand man, O'Ryan went about installing the hoods. Then it was time to dial in the shift linkage adjustment. Set about using what I call the Chris Neutral adjustment. Has work flawlessly for a long time. Not This Time. Looks like Chris might have been converted to the 4th gear club. After more time I want to admit (or charge for) we couldn't get it to completely shift into the 1-3-5 plane. Pulling my hair out ............... this isn't supposed to be that tough. Long story short. Finally determine its not the linkage adjustment. I have a nice and tidy neutral. Can feel all gears. Just won't stay in lower plane. So we finally pull off the shift cover. Remove the shift rod. Then go about shifting the gear box by hand. Still no lower/back plane. Gear box is toast. (IMG:style_emoticons/default/ar15.gif) (IMG:style_emoticons/default/ar15.gif) (IMG:style_emoticons/default/ar15.gif) Mike is amendment it worked great when he drove it in San Diego and when he drove it up here years ago. (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif) So I grab the ball pin and watch it turn. Guess what. The ball pin is turning and not the shift rod. That don't look right. So I go over and check other gear boxes standing in the corner. No Play. Hmmmmmmmmmmmmm. I did have a coil pin, not just a roll pin. Shifted great last time I drove it : New Data Points
Pin was tight drifting it out. But only in the ball pin I assume. The hole seems to be wallered up and down. Can it be fixed ? New 6 * 31 coil pin ? Can I enlarge both holes to accommodate a 1/4 * 1 1/4 coil pin ? Brain Trust : Whats been done before ? |
cary |
Feb 5 2018, 09:26 AM
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#2
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest |
Hmmmm
On the way out to the shop I stopped for some coil pins. No luck just roll pins. Both 1/4 and 6mm. First Data point in my head. The PET calls outs a 6 * 32 roll pin. The coil pin the came out was 5.79xx and really worn in the middle. The roll pins I bought had on OD of 6.02mm. I enlarged the hole in the ball with a 15/64 drill bit. 5.9531mm. Hole started at 5.831. Not too much but the new 6mm wouldn't start. After running the drill thru there the new roll pin fit nicely, though a little short. They only had 30mm. So I installed it back on the transmission and gave it a go. Thus time I couldn't see any movement with the naked eye. (IMG:style_emoticons/default/biggrin.gif) Installed the shift rod back on, time for a test. The lower plane shifts feel a little better. So I give it the test. Will it stay in gear ? Start the car in 3rd. Pops right out. Start the car in 5th. Pops right out. Time for a time out. Short day, heading to a birthday dinner ............ But I pull down the spare gearbox and start draining the oil. Only to find out its stuck in 4th gear. (IMG:style_emoticons/default/mad.gif) The battery in my micrometer was giving me issues so a little shy on numbers. Here's the info on coil pins. https://www.spirol.com/library/sub_catalogs...led_Pins_us.pdf |
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